Adding Win 7 to SBS 2003 domain issue

Adding Win 7 to SBS 2003 domain issue

I am attempting to add a Windows 7 PC to a SBS 2003 remotely via LogMeIn.
The SBS server resides at 192.168.0.100 The attempt fails because the
Windows 7 box gets its DNS from 192.168.0.254 & that DNS server apparently
does not have a domain service record for the SBS server.
Doing research I found an article that stated the Win 7 box should use the
SBS servers IP address ONLY for DNS, no secondary DNS address, in order to
domain join.
I changed the DNS address on the Win 7 box to 192.168.0.100, rebooted the
Win 7 box & promptly lost connectivity to the Win 7 box until this morning
when the user came into the office & I talked him through setting the DNS
to 192.168.0.254 which gave back connectivity via LogMeIn.
Any ideas on how to connect this PC to the SBS server domain?
I am using connectcomputer option is there another way to join a PC to SBS
2003?
TIA